Enhanced electrochemical performance of aqueous Zn-ion batteries based on Na 2 V 6 O 16 ·2H 2 O cathodes: insights from DFT and synchrotron X-ray analysis

A Na 2 V 6 O 16 ·2H 2 O cathode, synthesized via Na pre-intercalation using a sonochemical method, enhances Zn-ion storage by improving structural stability. The NaVO//Zn battery delivers 126 mA h g −1 and retains 91.8% of its capacity after 10 000 cycles.